CN111109376A - Negative pressure type cooling machine suitable for rapid cooling of pan-fired green tea after de-enzyming and use method thereof - Google Patents
Negative pressure type cooling machine suitable for rapid cooling of pan-fired green tea after de-enzyming and use method thereof Download PDFInfo
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- CN111109376A CN111109376A CN202010032395.9A CN202010032395A CN111109376A CN 111109376 A CN111109376 A CN 111109376A CN 202010032395 A CN202010032395 A CN 202010032395A CN 111109376 A CN111109376 A CN 111109376A
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- 244000269722 Thea sinensis Species 0.000 title claims abstract description 136
- 238000001816 cooling Methods 0.000 title claims abstract description 72
- 235000009569 green tea Nutrition 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 20
- 235000013616 tea Nutrition 0.000 claims abstract description 109
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000004383 yellowing Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 102000004190 Enzymes Human genes 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000009849 deactivation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 241001012533 Acrida cinerea Species 0.000 description 1
- 102000004316 Oxidoreductases Human genes 0.000 description 1
- 108090000854 Oxidoreductases Proteins 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/06—Treating tea before extraction; Preparations produced thereby
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D1/00—Devices using naturally cold air or cold water
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- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Food Science & Technology (AREA)
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- Tea And Coffee (AREA)
Abstract
The invention discloses a negative pressure type cooler suitable for quickly cooling roasted green tea after fixation and a use method thereof, wherein the negative pressure type cooler comprises a tea sieve placing frame, a cooler main body and an exhaust fan; the tea sieve placing rack is provided with vent holes; a cavity with an opening at the upper part is arranged in the cooler main body; the tea sieve placing frame is arranged above the cooler main body, and the vent hole is communicated with the cavity; the exhaust fan is arranged on the side wall of the cooler body and communicated with the cavity. The invention adopts the principle of negative pressure type cooling to construct the negative pressure type cooling machine which is suitable for quickly cooling the de-enzymed green tea, and the negative pressure type cooling machine can quickly cool the de-enzymed green tea, thereby not only meeting the requirement that the de-enzymed leaves of the de-enzymed green tea are required to be thinned and cooled, but also realizing the purpose of quickly cooling the de-enzymed leaves, reducing the yellowing rate of the tea and improving the quality of the tea. And simultaneously, realize the cooling to the tealeaves that completes of great volume, and cooling speed is very fast, compromises efficiency and quality.
Description
Technical Field
The invention relates to the technical field of tea processing equipment, in particular to a negative pressure type cooling machine suitable for quickly cooling roasted green tea after being deactivated and a use method thereof.
Background
In the tea leaf making process, enzyme deactivation is a very important step, and has a great influence on the final formation of tea leaf quality. Tea de-enzyming refers to a process of destroying and passivating oxidase activity in tea by utilizing high temperature (200-300 ℃) to promote water evaporation of fresh tea, and has key effects of softening leaves, facilitating subsequent tea rolling, promoting low-boiling-point odor volatilization, promoting tea aroma formation and the like.
If the tea leaves are not cooled quickly after being de-enzymed, the tea leaves are easy to pile, suffocate and yellow and ferment, and the quality of the tea leaves is greatly reduced. Therefore, the rapid cooling of the tea leaves is a key supplementary step after the tea leaves are de-enzymed. The cooling speed and effect of the tea leaves have a great influence on the subsequent tea quality formation.
The traditional cooling mode is as shown in figure 1, the tea leaves after being de-enzymed are uniformly laid on a tea sieve to be naturally cooled, the method is long in time consumption and large in occupied area, the heat dissipation of the upper layer leaves and the lower layer leaves is not uniform, and the cooling is slow. The subsequent step of cooling by an air blower is added, and although the improvement method accelerates the cooling of the tea leaves, the air blower is easy to turn over the tea leaves, and the tea leaves are easy to damage, so that the quality of the tea leaves is reduced.
In order to overcome the defects of the traditional cooling method after the tea leaves are enzyme-deactivated, a plurality of improvement methods are proposed. Through retrieval, chinese patent application No. 2016108401057 (a tealeaves cooling device), 2016110228403 (a tealeaves cooling device), 2016111136305 (a tealeaves rapid cooling device), 2017112037034 (a cooling all-in-one that completes for tealeaves), 2017113485998 (a tealeaves rapid cooling device), 2018106219701 (a tealeaves processing rapid cooling device), 2018106908013 (an efficient cooling device that completes for tealeaves), 2018107352993 (a full-automatic tealeaves cooling conveyor) provided multiple solutions.
The method improves the problems of slow cooling speed, long time, uneven cooling and the like of the traditional method. However, the devices of the invention are all provided with special tea green hoppers, and the tea green needs to be thrown to the hoppers so as to carry out the subsequent cooling step. The tea leaves in the hopper are stacked in multiple layers, so that the cooling efficiency is reduced, a high-power air blower is needed, the tea leaves are easy to turn by the high-power air blower, and serious tea leaves cause damage to the tea leaves and influence on the formation of the quality of the follow-up tea leaves. The existing device has the characteristics that the manufacturing process of spreading and cooling after the tea is de-enzymed in the manufacturing process of the pan-fired green tea cannot be met.
Disclosure of Invention
The invention aims to overcome the following defects in the prior art: (1) the traditional cooling mode has uneven cooling and slow speed; (2) the cooling methods provided by the prior art are all provided with feeding hoppers, tea leaves are accumulated in the hoppers, and positive blast cooling of an air blower easily causes tea leaves to turn over, damages the tea leaves and influences the quality of subsequent tea leaves; (3) the prior art cannot adapt to the process that green-frying and enzyme-deactivating leaves need to be thinned and cooled quickly. The invention provides a negative pressure type cooling device for de-enzyming leaves of pan-fired green tea.
The invention aims to provide a negative pressure type cooling machine which is suitable for quickly cooling the roasted green tea after the green tea is deactivated.
The second purpose of the invention is to provide a method for quickly cooling the roasted green tea after the fixation.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a negative pressure type cooler suitable for quickly cooling roasted green tea after being deactivated comprises a tea sieve placing frame, a cooler main body and an exhaust fan; the tea sieve placing rack is provided with vent holes; a cavity with an opening at the upper part is arranged in the cooler main body; the tea sieve placing frame is arranged above the cooler main body, and the vent hole is communicated with the cavity; the exhaust fan is arranged on the side wall of the cooler body and communicated with the cavity.
Preferably, the diameter of the tea sieve of the negative pressure type cooler is 100 cm-110 cm, and the specification of the exhaust fan is as follows: 20 cun, 220V, 370W, 1400 commentaries on classics, reach the purpose of quick cooling a large amount of leaves that fix green, compromise efficiency and quality.
During the use, the tea sieve is placed on the tea sieve placing frame, and air vent, cavity and air exhauster are connected gradually, and the air exhauster during operation is bled from the cavity, makes to form the negative pressure in the cavity, and inside the outside air got into the cavity fast by the air vent for a large amount of air were through placing the tealeaves on the tea sieve, thereby reached refrigerated purpose.
Preferably, the exhaust fan is also provided with a time control component and a speed control component. The time control component can control the air draft time of the exhaust fan, and the exhaust fan automatically stops running after running for a certain time (about 60-180 s) after the switch is started each time; the speed control component can control the wind speed of the exhaust fan (adopting variable frequency wind speed). The air draft time and the air draft speed are matched in a matching manner so as to achieve the optimal quick cooling purpose.
Preferably, the tea sieve placing frame is movably connected with the cooler main body. The tea sieve placing frame is rotationally connected with the cooler main body, so that the tea sieve placing frame and the cooler main body are relatively fixed in position and are not easy to fall off; on the other hand, can open the tea sieve rack as required to inside the clearance cavity.
Preferably, the tea sieve placing frame is rotatably connected with the cooler main body, and more preferably, the tea sieve placing frame is rotatably connected with the cooler main body through a rotating shaft.
Preferably, the cavity is an inverted arch U-shaped groove, and two ends of the cavity are connected with the cooler main body. The inverted arch U-shaped groove is more favorable for the movement of air in the cavity.
More preferably, both ends of the cavity are tightly connected with the cooler main body, so that an additional air inlet or air outlet is arranged on a path of air movement formed by the vent hole, the cavity and the exhaust fan, and the air exhaust effect is prevented from being influenced.
Preferably, the cavity is an inverted arch U-shaped groove, and the exhaust fan is arranged at the position of the arc center of the cooler main body corresponding to the inverted arch U-shaped groove. The axis of the semicircle design of cavity overlaps with the axis of axial fan, and when the fan rotated, the turbine effect that forms was better, and it is bigger to form the negative pressure, improves outside air's inflow speed, obtains better cooling effect.
Preferably, the ventilation apertures are formed by a barrier structure. The vent holes formed by the fence structure have large ventilation area and convenient manufacture.
Preferably, a limiting part is arranged around the tea sieve placing frame. The limiting part can prevent the tea sieve from sliding down.
Preferably, the cooler body is provided at a lower portion thereof with a position fixing member. The position fixing component can relatively fix the position of the negative pressure type cooler and the ground surface, and prevent the position of the negative pressure type cooler from moving.
The invention also claims a method for quickly cooling the roasted green tea after fixation, which uses any negative pressure type cooling machine.
Preferably, the diameter of the tea sieve of the negative pressure type cooler is 100 cm-110 cm, and the specification of the exhaust fan is as follows: 20 inches, 220V, 370W and 1400 turns, no more than 7 kilograms of tea leaves after de-enzyming are placed on a tea sieve, and a fan is started.
More preferably, 2 kilograms of the enzyme-deactivated tea leaves are placed on a tea sieve, and a fan is started for 90 seconds; placing 2-5 kg of the enzyme-deactivating tea leaves on a tea sieve, and starting a fan for 90-180 s; placing 5 kilograms of enzyme-deactivating tea leaves on a tea sieve, and starting a fan for 180 seconds;
more preferably, 5 kg of the enzyme-removed tea leaves are placed on a tea sieve, and the fan is started for not less than 102 s.
More preferably, 4-5 kg of the enzyme-deactivated tea leaves are placed on a tea sieve, and a fan is started for 80-120 s.
Most preferably, 5 kg of the tea leaves are placed on the tea sieve, and the fan is turned on for 180s
The method is characterized in that the amount of green tea leaves put into a pot is calculated by 5 kilograms, the fan is started for 102s, the temperature of the green tea leaves can be reduced to normal temperature from 70-80 ℃ when the green tea leaves are taken out of the pot, and the fan is continuously started subsequently, so that evaporation of water on the surfaces of the leaves and redistribution of water inside the leaves are accelerated.
Compared with the prior art, the invention has the following beneficial effects:
the invention adopts the principle of negative pressure type cooling, constructs a negative pressure type cooling machine suitable for quickly cooling the de-enzymed green tea, and establishes a corresponding method suitable for quickly cooling the de-enzymed green tea.
Drawings
Fig. 1 shows a conventional cooling method.
Fig. 2 shows the cooling method of the present invention.
Fig. 3 is a perspective view of the negative pressure type cooler of the present invention in a closed state.
Fig. 4 is a perspective view of the negative pressure type cooler of the present invention in an open state.
Fig. 5 is a front view of the negative pressure type cooler of the present invention.
Fig. 6 is a left side schematic view of the negative pressure type cooling machine main body of the invention.
Fig. 7 is a right side schematic view of the negative pressure type cooler body of the present invention.
Fig. 8 is a graph showing the relationship between the amount of tea leaves fed and the time required for cooling the tea leaves to normal temperature when the negative pressure type cooling machine of the present invention is used for cooling the tea leaves.
FIG. 9 is a graph showing the relationship between the amount of tea leaves fed and the reduction in the moisture content of the tea leaves cooled to room temperature when the tea leaves are cooled by the negative pressure type cooling machine of the present invention.
Wherein, 1 is a tea sieve placing rack, and 11 is a vent hole; 2 is a cooler main body, 21 is a cavity, and 22 is a position fixing part; and 3 is an exhaust fan.
Detailed Description
The invention is described in further detail below with reference to the drawings and specific examples, which are provided for illustration only and are not intended to limit the scope of the invention. The test methods used in the following examples are all conventional methods unless otherwise specified; the materials, reagents and the like used are, unless otherwise specified, commercially available reagents and materials.
Embodiment 1 a negative pressure type cooling machine suitable for rapid cooling of pan-fired green tea after de-enzyming
A negative pressure type cooler suitable for rapidly cooling roasted green tea after being deactivated is shown in figures 2 to 7 and comprises a tea sieve placing frame (1), a cooler main body (2) and an exhaust fan (3); the tea sieve placing rack (1) is provided with vent holes (11); a cavity (21) with an opening at the upper part is arranged in the cooler main body (2); the tea sieve placing frame (1) is arranged above the cooler main body (2), and the vent holes (11) are communicated with the cavity (21); the exhaust fan (3) is arranged on the side wall of the cooler main body (2) and communicated with the cavity (21). Wherein, the diameter of the tea sieve placing rack (1) is 100 cm-110 cm, and the specification of the exhaust fan (3) is as follows: 20 cun, 220V, 370W, 1400 commentaries on classics not only can cool off a large amount of tea that completes simultaneously this moment, and the cooling rate is fast effectual simultaneously, compromises efficiency and quality simultaneously.
During the use, the tea sieve is placed on tea sieve rack (1), and air vent (11), cavity (21) and air exhauster (3) are connected gradually, and air exhauster (3) during operation is bled from cavity (21) for form the negative pressure in cavity (21), and then inside the air bleeds through air vent (11) and gets into cavity (21), make a large amount of air through placing the tealeaves on the tea sieve, thereby reach refrigerated purpose.
The exhaust fan is also provided with a time control component and a speed control component. The time control component can control the air draft time of the exhaust fan, and the exhaust fan automatically stops running after running for a certain time (about 60 seconds) after the switch is started each time; the speed control component can control the wind speed of the exhaust fan (adopting variable frequency wind speed). The air draft time and the air draft speed are matched in a matching manner so as to achieve the optimal quick cooling purpose.
The tea sieve placing rack (1) is movably connected with the cooler main body (2) through a rotating shaft. The tea sieve placing frame (1) is rotationally connected with the cooler main body (2), so that on one hand, the positions of the tea sieve placing frame (1) and the cooler main body (2) are relatively fixed, and the tea sieve placing frame (2) is not easy to fall off; on the other hand, can open the tea sieve rack as required to inside the clearance cavity.
Cavity (21) are radius arched door form U type recess, cavity (21) both ends and cooler main part (2) zonulae occludens, and air exhauster (3) set up the arc centre of a circle position that corresponds the arched door form U type recess of cavity (21) on cooler main part (2). The inverted arch U-shaped groove is more beneficial to the movement of air in the cavity, so that an extra air inlet or an extra air outlet is formed in an air movement path formed by the vent hole (11), the cavity (21) and the exhaust fan (3) and the air exhaust effect is prevented from being influenced. The axis of the semicircle design of cavity (21) overlaps with the axis of axial fan, and when the fan rotated, the turbine effect that forms was better, and it is bigger to form the negative pressure, improves the speed of outside wind current, obtains better cooling effect.
The vent holes (11) are formed through the fence structure, and the vent holes formed through the fence structure are large in vent area and convenient to manufacture.
Limiting parts are arranged around the tea sieve placing frame, and the limiting parts can prevent the tea sieve from sliding off carelessly.
The lower part of the cooler main body (2) is provided with a position fixing component (22) sucker, and the position of the negative pressure type cooler and the ground can be relatively fixed by the arrangement of the position fixing component (22) sucker, so that the position of the negative pressure type cooler is prevented from moving.
The de-enzymed tea leaves with different weights are cooled by using the negative pressure type cooling machine which is suitable for rapidly cooling the de-enzymed green tea leaves after de-enzyming in the embodiment, and relevant data are counted, and the result is shown in table 1 and figures 8-9.
Table 1:
according to the result show throw tea volume more tealeaves blade cool down to the time of normal atmospheric temperature longer, but the water content also can be lower this moment, synthesize cooling time and water content, throw the tea volume when 4 to 5 kilograms, the cooling effect is best, especially when throwing the tea volume and be 5 kilograms, the blade falls to the normal atmospheric temperature and only needs 102s, and the water content can reduce 3.6 ~ 4.9%.
Usually, 2 kilograms of enzyme-deactivating tea leaves are placed on a tea sieve, and a fan is started for 90 seconds; placing 2-5 kg of the enzyme-deactivating tea leaves on a tea sieve, and starting a fan for 90-180 s; 5 kilograms of the tea leaves after the enzyme deactivation is placed on a tea sieve, and a fan is started for 180 seconds. The method is characterized in that the amount of green tea leaves put into a pot is calculated by 5 kilograms, the fan is started for 102s, the temperature of the green tea leaves can be reduced to normal temperature from 70-80 ℃ when the green tea leaves are taken out of the pot, and the fan is continuously started subsequently, so that evaporation of water on the surfaces of the leaves and redistribution of water inside the leaves are accelerated.
Claims (10)
1. A negative pressure type cooler suitable for quickly cooling roasted green tea after being deactivated is characterized by comprising a tea sieve placing frame (1), a cooler main body (2) and an exhaust fan (3); the tea sieve placing rack (1) is provided with vent holes (11); a cavity (21) with an opening at the upper part is arranged in the cooler main body (2); the tea sieve placing frame (1) is arranged above the cooler main body (2), and the vent holes (11) are communicated with the cavity (21); the exhaust fan (3) is arranged on the side wall of the cooler main body (2) and communicated with the cavity (21).
2. The negative-pressure chiller according to claim 1 wherein the suction fan is provided with time and speed control means.
3. A negative-pressure cooler according to claim 1, characterised in that the tea sieve holder (1) is movably connected to the cooler body (2).
4. A negative-pressure cooler according to claim 1, characterised in that the cavity (21) is an inverted arch-shaped U-shaped groove, the ends of which are connected to the cooler body (2).
5. The negative-pressure cooler according to claim 4, characterized in that the cavity (21) is an inverted arch U-shaped groove, and the suction fan (3) is arranged on the cooler body at the position corresponding to the arc center of the inverted arch U-shaped groove.
6. A negative-pressure cooler according to claim 4, characterized in that the ventilation holes (11) are formed by a fence structure.
7. A negative-pressure cooler according to claim 1, characterised in that a limiting part is arranged around the tea sieve holder (1).
8. The negative-pressure cooler according to claim 1, characterized in that the cooler body (2) is provided at a lower portion thereof with a position fixing member (22).
9. A method for rapidly cooling pan-fired green tea after de-enzyming, which is characterized in that the negative pressure type cooling machine of any one of claims 1 to 9 is used.
10. The method of claim 9, wherein the negative pressure cooler has a tea sieve diameter of 100cm to 110cm and an exhaust fan specification of: 20 inches, 220V, 370W and 1400 turns, no more than 7 kilograms of tea leaves after de-enzyming are placed on a tea sieve, and a fan is started.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010032395.9A CN111109376A (en) | 2020-01-13 | 2020-01-13 | Negative pressure type cooling machine suitable for rapid cooling of pan-fired green tea after de-enzyming and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010032395.9A CN111109376A (en) | 2020-01-13 | 2020-01-13 | Negative pressure type cooling machine suitable for rapid cooling of pan-fired green tea after de-enzyming and use method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103431086A (en) * | 2013-08-13 | 2013-12-11 | 镇江市丹徒区上党墅农茶叶专业合作社 | Rapid cooling device for enzyme deactivating and water removing of tea leaf |
| CN108634038A (en) * | 2018-08-21 | 2018-10-12 | 芜湖市春满壶茶业有限公司 | A kind of natural-wind-imitating cooling device for tea processing |
| CN209345952U (en) * | 2018-09-10 | 2019-09-06 | 宜昌东方昌绿茶业有限公司 | A kind of efficient tea water-removing machine |
| CN211861690U (en) * | 2020-01-13 | 2020-11-06 | 广东省农业科学院茶叶研究所 | Negative pressure type cooling machine suitable for rapid cooling after de-enzyming of pan-fired green tea |
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2020
- 2020-01-13 CN CN202010032395.9A patent/CN111109376A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103431086A (en) * | 2013-08-13 | 2013-12-11 | 镇江市丹徒区上党墅农茶叶专业合作社 | Rapid cooling device for enzyme deactivating and water removing of tea leaf |
| CN108634038A (en) * | 2018-08-21 | 2018-10-12 | 芜湖市春满壶茶业有限公司 | A kind of natural-wind-imitating cooling device for tea processing |
| CN209345952U (en) * | 2018-09-10 | 2019-09-06 | 宜昌东方昌绿茶业有限公司 | A kind of efficient tea water-removing machine |
| CN211861690U (en) * | 2020-01-13 | 2020-11-06 | 广东省农业科学院茶叶研究所 | Negative pressure type cooling machine suitable for rapid cooling after de-enzyming of pan-fired green tea |
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